This spelling should follow a more logical form, Puss from the truncated word Pussy. This slang refers to cats as an association to the female gender or female genitals and is used to describe a male that has been subjugated by a female or a male that does not stand up to the stature of being a male in the given social circumstance.

I would spell this word "Puss", as in Puss'n Boots or as in He's a Puss (Pussy) to spell it "pouse" so as not to offend the girls. :)

Sometimes when you poop, it's more like mouse. So, POUSE. Often the texture of hair mouse, or spray foam. Sometimes when brought on my antibiotics or menstruation, it can look just like brown shaving cream (foam not gel). Usually a Shit